I'd be curious to see some dyno pulls on before and after on these things. Where I heard you will lose torque down low is if every thing else on the motor is stock (intake, heads, exhaust). I think there is some kind of write up about air flow on C&L's web site about the new intake they are working on.
It says something like the intake side on a stock head flows 236 cfm while the stock intake with the plates still installed flows 250-260 cfm.
So if these numbers are good, you don't pick up any flow on stock heads by removing the plates (and actually lose torque, because the restriction and angle of the plates increases air velocity at low speeds). But, if you have head work and headers, it looks like you will help the intake exceed the 260 mark to match up better to your head work (which is what...280 to 300 cfm?). But even if you remove the plates and are still stock everywhere else you should still pick up HP up high since you eliminate the turbulence (not restriction). You just may lose torque down low. I'm all about torque so I'm waiting until I either get head work or a blower.
__________________ 06 Stang GT, Yeah I got stuff! Check out my profile for the low down. | 
. Plenty of days off though.
